VDB-306380 · CVE-2025-2866 · EUVD-2025-12434

LibreOffice up to 24.8.5/25.2.1 adbe.pkcs7.sha1 Signature signature verification

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4.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in LibreOffice up to 24.8.5/25.2.1 and classified as problematic. This affects an unknown function of the component adbe.pkcs7.sha1 Signature Handler. Such manipulation leads to signature verification. This vulnerability is referenced as CVE-2025-2866. It is possible to launch the attack remotely. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in LibreOffice up to 24.8.5/25.2.1. Affected by this issue is an unknown code of the component adbe.pkcs7.sha1 Signature Handler. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is integrity. CVE summarizes:

Improper Verification of Cryptographic Signature vulnerability in LibreOffice allows PDF Signature Spoofing by Improper Validation. In the affected versions of LibreOffice a flaw in the verification code for adbe.pkcs7.sha1 signatures could cause invalid signatures to be accepted as valid This issue affects LibreOffice: from 24.8 before < 24.8.6, from 25.2 before < 25.2.2.

The weakness was published by Juraj Šarinay. The advisory is shared for download at libreoffice.org. This vulnerability is handled as CVE-2025-2866 since 03/27/2025. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 234915 (Debian dsa-5908 : fonts-opensymbol - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 24.8.6 or 25.2.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (234915) and EUVD (EUVD-2025-12434). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Office Suite Software

Name

LibreOffice

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔍
CNA CVSS-BT Score: 🔍
CNA Vector: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 234915
Nessus Name: Debian dsa-5908 : fonts-opensymbol - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: LibreOffice 24.8.6/25.2.2

Timelineinfo

03/27/2025 🔍
04/27/2025 +30 days 🔍
04/27/2025 +0 days 🔍
07/04/2025 +67 days 🔍

Sourcesinfo

Advisory: libreoffice.org
Researcher: Juraj Šarinay
Status: Confirmed

CVE: CVE-2025-2866 (🔍)
GCVE (CVE): GCVE-0-2025-2866
GCVE (VulDB): GCVE-100-306380
EUVD: 🔍

Entryinfo

Created: 04/27/2025 21:32
Updated: 07/04/2025 01:42
Changes: 04/27/2025 21:32 (67), 04/29/2025 12:42 (2), 05/13/2025 04:31 (1), 07/04/2025 01:42 (12)
Complete: 🔍
Cache ID: 216::103